Integrated: fixing jextract sample issues for jdk 22

[Athijegannathan Sundararajan]

On Fri, 12 Jan 2024 11:53:55 GMT, Athijegannathan Sundararajan <sundar at openjdk.org> wrote:

> * re-generated libjimage sources and manually adopted for library loding.
> * avoid attempting to generate unsupported type constants ("long double")
> * adjust shell scripts for different versions of native libraries
> * allow Python home to be overridden by env. vars

This pull request has now been integrated.

Changeset: 1b6a9c0d
Author:    Athijegannathan Sundararajan <sundar at openjdk.org>
URL:       https://git.openjdk.org/jextract/commit/1b6a9c0d6d1480c57d9a7dff88751815b8abef6f
Stats:     955 lines in 41 files changed: 372 ins; 444 del; 139 mod

fixing jextract sample issues for jdk 22

Reviewed-by: jvernee, mcimadamore

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PR: https://git.openjdk.org/jextract/pull/174